/*
 * Copyright 2022 The Open Islands Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.openislands.oi.rpc.base;

import java.util.HashMap;
import java.util.Map;

public abstract class Extended<K, V> {
    private final Map<K, V> storage;

    public Extended() {
        this.storage = new HashMap<>();
    }

    public Extended<K, V> put(K key, V value) {
        this.storage.put(key, value);
        return this;
    }

    public V get(K key) {
        return this.storage.get(key);
    }

    public V get(K key, V defaultValue) {
        final V value = this.storage.get(key);
        if (value == null) {
            put(key, defaultValue);
            return defaultValue;
        }
        return value;
    }
}
